Key retention service



FIG. 1 is a front plan view of the key retention service of the present invention;

FIG. 2 is a rear plan view of the key retention service of FIG. 1;

FIG. 3 is a right side plan view of the key retention service of FIG. 1;

FIG. 4 is a left side plan view of the key retention service of FIG. 1;

FIG. 5 is a top plan view of the key retention service of FIG. 1; and,

FIG. 6 is a bottom plan view of the key retention service of FIG. 1. 

The ornamental design for a key retention service, as shown. 